Vacuum insulation.



F W. GUIBERT.

VACUUM INSULATION.

APPLICATION man FEB. 28. |9 I4.

Patented J 11116 13, 1916.

, omo 0 0 0 0 0 0 0 0 0 0 0 0 w 0 O O O O O O O O O Wnmmssss H'ORHEY boiler shell and the atmosphere. um insulation is then apphed over these as- F WALTER GUI BERT, OF DETROIT, MICHIGAN.

vacuum INSULATION.

Specification of Letters Patent.

Patented June 13, 1916.

Application filed February 28, 1914. Serial No. 821,626;

have invented a certam new and usefulImprovement in Vacuum Insulation, and declare the following to be a full, clear, and

exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to vacuum insulation and especially vacuum heat insulation that is made up of a plurality of sections; which may be made by a manufacturer as staple articles of manufacture and may be purchased by a customer to apply to whatever he has that needs insulation.

These vacuum sections may be constructed to fit together to surround the special object for which they are designed. They may be used to insulate steam-boilers, steampipes, furnace pipes, refrigerating appara tus and all the manifold things made more effective by good insulation. It is, however, as an insulation for steam-boilers that my sectional insulation was first brought out.

In the drawings: Figure 1 is a side elevation of a boiler and the applied sectional insulation; partly broken away. Fig. 2 is across section of the boiler and applied insulation. Fig. 3 is a front and alsoa se tional view of a modified form of vacuum section. Fig. 4 is a front and also a sectional view of another modified form of vacuum section.

A conventional form of cylindrical boiler is shown and designated a. This boiler is made up of the usual boiler-plates riveted together. On the outside of the boiler shell I place strips of asbestos to prevent direct connection between the boiler shells and thewalls of the vacuum section. This contact would serve as a conductor between the The'vacubestos strips, and consists of a plurality of vacuum sections or shells, 6. These vacuum sections are manufactured for receptacles of various diameters. In the boiler shown in the drawings four sections are shown making one complete ring around the boiler, but, of course, no definlte number 1s requisite. These sections 6 are preferably arranged about the receptacle so that the lndividual members of each row or ring Wlll be staggered or each row may be said to break joints. I have shown the ends of the sections provided with lugs so that ad jacent sections may be fastened and drawn tightly together by bolts and nuts. Of course, metal straps or other tightening devices could be employed. The sections are, preferably provided with openings (1, so placed that pairs of openings in adjacent sections are in proximity. These pairs of openings may be connected with suitable short lengths of pipe 6, after the vacuum .sections have been applied to the receptacle to be insulated. These connections allow the exhausting of the insulation at one point instead of exhausting each section separately. In steam-boilers I, preferably, connect the insulation directly to the condenser by the condenser pipe 7. The condenser of the engine may then be used to keep the sections exhausted.

Inasmuch as it is much cheaper and convenient to make the vacuum sections out of sheet metal as contradistinguished from plate metal, I have found it advisable to build my vacuum sections as shown in Figs. 3 and 4. In Fig. 3 the metal is pressed to form a plurality of intersecting grooves g. The sheets of metal on opposite sides of the section are laid out so that their grooves will preferably cross when the section is completed. A sheet of asbestos It is laid in between the side sheets and the bottoms of the grooves are separated by this asbestos so as to prevent material loss of heat by conduction. The walls of these grooves act as stays to prevent the metal buckling or becoming indented. In Fig. 4 a slightly different method of indention to stay the sides is shown. This comprises spot indention instead of groove indention.

What I claim is- 1. Insulation, comprising a portable vacuum shell complete in itself, a sheet of insulating material between the side walls of the shell and stay portions on each side wall lying against the insulating material and stay portions on the other side wall.

2. Insulation, comprising a portable vacuum shell complete in itself, having its side 'walls indented so that indentions in the opposite side walls cross, and sheet insulating materials interposed between the indenting portions of the two side walls to hold them out of contact.

3. Insulation for a receptacle, comprising in combination with the receptacle, a strip of insulating material lying against the receptacle, a plurality of vacuum sections each a complete shell in itself, and means for holding the same in place about the receptacle and against the said insulating material.

4. Insulation, comprising a plurality of connectible and complete vacuum sections large side walls, and insulating material between opposite stay portions which would otherwise contact.

6. Insulation, comprising a'plurality of connectible shells, each forming a complete inclosure in itself and adapted to have its contents evacuated, opposite side walls being provided with indented portions which bear against one another to support the shell walls.

7. Insulation, comprising a plurality of portable vacuum shells adapted to fit together, and each shell a complete inclosure in itself, opposite side walls being provided with stay portions which bear against one another to support the side walls.

In testimony whereof, I sign this specification in the presence of two witnesses.

F WALTER- GUIBERT.

Witnesses: MARIETTA E. RUDD, VIRGINIA C. SPRATT. 

